Topic
Nitrite
About: Nitrite is a research topic. Over the lifetime, 15425 publications have been published within this topic receiving 484581 citations.
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TL;DR: It is proposed that some apple polyphenols not only inhibit nitrosation/nitration but also promote *NO bio-availabilty at the gastric level, a previously unappreciated function.
148 citations
TL;DR: In this article, a detailed study on the acceleration mechanism of the above-mentioned oxidation was performed at pH values between 3.0 and 5.6 at various freezing rates, by different freezing methods, and with and without additional salts.
Abstract: The oxidation of nitrite by dissolved oxygen to form nitrate is known to be accelerated ca. 105 times by the freezing of the aqueous solution.1 Here we report a detailed study on the acceleration mechanism of the above-mentioned oxidation. The reaction was studied at pH values between 3.0 and 5.6 at various freezing rates, by different freezing methods, and with and without additional salts. The effect of freezing which induced concentration (freeze concentration) of reactants into the unfrozen bulk solution was too small to explain the acceleration factor of ca. 105. Nitrate formations were completely prevented by addition of salts, such as NaCl and KCl, which make the freezing potential of ice negative, while the reaction was not affected by addition of salts, such as Na2SO4 and NH4Cl, which make the freezing potential of ice positive. When a sample solution was frozen in such a way as to form a single crystal of ice, most nitrite was exclusively liberated from the ice to the gas phase. This observation...
148 citations
TL;DR: A heterotrophic nitrifier, strain NR, was isolated from a membrane bioreactor and it was demonstrated that neither nitrite nor nitrate could be denitrified aerobically by strain NR and two different metabolic pathways might exist in A. faecalis.
148 citations
TL;DR: It was found that oxygen concentration played an important role in the production of nitrous oxide, which increased with decreasing oxygen concentration, even at limited oxygen concentration.
148 citations
TL;DR: During steady state turnover with dithionite and nitrite, the enzyme forms a complex with added nitrite with absorption difference maxima at 445, 538, and 580 nm with respect to reduced enzyme, indicating that nitrite reductase may form complexes with nitrogen compounds of more than one oxidation state.
147 citations